Drier.



C. A. WENDELL.

DRIER.

APPLICATIGN FILED )UNE l2. 1915.

vPatented June 20, 1916.

2 SHEETS-SHEET l.

C. A. WENDELL.

DRIER.

APPLICATION FILED JUNE I2 Patented June 20, 1916.

2 SHEETS-SHEET 2.

CARL A. WENDELL, 0F JOLIE'I, ILLINOIS.

l imma.

Specication of Letters Patent. v Patented Julie 20, 1916.

Application filed .Tune 12, 1915. Serial N0. 33,793'l '1 .To all lwhom z't may concern.'

Be it known that I, CARL A. YEivDELL, a citizen of the United States, residing at Joliet, inthe county of Will and State of Illinois, have invented a certain new and useful Improvement in Driers, of which the following is a specication.

My invention relates to a machine for drying'niaterials and it is illustrated fin a particular form of apparatus adapted for drying coal. s The drawings are more or less diagrammatic but suflicient to enable a skilled workman to construct therefrom a working machine.

In drying coal by centrifugal machines a considerable part of the problem is removing the dry coal from the machine after the water has been discharged by centrifugal force through a retaining screen.

'My invention relates to means for moving the material to be dried continuously during the drying process along' and over the screen to the surface.

My invention in the form in which I ,have designed it for use in connection with the drying of coal may employ discharge chutes depressed fromv and at an angle to the surface of the screen and Scrapers which pass over the surface of such screen, and in the Vbest form of my invention I use both of these features associated with a dish-shaped screen. In such an apparatus as that illustrated,v the material is carried over the screening surface during the water expelling operation by centrifugal force and is discharged over the edge of the dish-shaped screen or through the inclined chutes 'and the screens are kept clean and the motion of the material'facilitatedby the Scrapers, but of course not all of these peculiarities are modes of action or in every case essen` tial. Indeed in 'certain kinds of materials 'while such a dish-shaped screen might operate for a certain length of time andr to a certain degree, it is necessary nevertheless to scrape the material in order to keep the screen clean and to get proper action.

Figure 1 is a vertical section; Fig. 2 'a horizontal section; Fig. 3 a cross section on the line 3-3 of Fig. 1.

Like parts are indicated by the same letter in all the figures.

A, Aare frame and supp0rting`pieces.

upon which are suitably mounted the bearings A1, A1",A3 and A1. The bearings A2 lthe screen slightly beyond the and A3 support the shaft' A5, on one end of which is the driving pulley A0 and the gear wheel A7 and on the other end the beveled gear As. The bearings A1 and AJX support the shaft A9, on one end ofk which is the gearA1" slightly larger than and meshing with the gear A7 and on the other end is a beveled gear A11.

B isa vertical shaft supported in the bearings B1 and B2 suitably supported on the lower part of the frame. This shaft carries the beveled gear B3 meshin with the beveled gear AS and the hopper ottom B1L which carries the upwardly projecting dish-shaped screen B5 which is provided with an upper strengthening and:` material guide annulus B6. This annulus is cut away at B1, B7 to furnish an .outlet for the dis-v charge chute BE1 whose bottom and sides may or may not be of screen material and which opens above through the cut-away portion of the annulus B11. I have shown two of these discharge chutes and their aci companying parts.

Mounted on the shaftB is a tight sleeve' C carrying two spouts terminate above in the rounds the large feeding tube C3 into which thev material is fed through the frame by the fixed chute C4.

D, D are spider arms on which the cylinder C3 is mounted and the spider-is coinpleted by the ring D1. At the outer end 0f each of these arms is mounted a scraper D2 by means of the connecting braces D3. Each scraper has preferably a brush edge D1 and a lowerplow-like projection D". arms D i together' with the Scrapers are mounted on the hollow shaft DG supported on the sleeve C surrounding the shaft B and carrying the beveled gear D7 which is driven by the gear A11. These parts are so associated and constructed that the screen with its discharge chutes and annulus and the supply chutes are rotated constantly in the C1, C1. These spouts -same direction by the inner shaft at, for

example, 400 revolutions per minute, While feed cylinder rotate with the hollow shaft at a slightly slower speed, say at 399 revo" lutions per minute. The feed chutes C1, C1 are positioned as indicated so that vsince they discharge tangentially they tend to deposit their material on the lower part of discharge chute in the direction of rotation.

The spider lwithout abandoning others.

E is a dish-shaped stationary water box with waste outlet El and water trap rim E2. This latter cooperates with the rim E3 on the screen, and the two together prevent the water from rising and overflowing into the coal boX. Other desired means for drawing olf the water could be employed.

Fis a stationary material hopper with a return top F3 to prevent the escape of the material which is discharged by centrifugal do not Awish to be limited to the particular size, shape, proportion and arrangement of the several parts here illustrated and that some of the features of my invention illustratedand described may be dispensed with Many such changes are possible without departing lfrom the spirit of my invention.

The use and operation of my invention are as follows: `Assuming that, the parts are arranged substantially as illustrated and set in motion, thefmaterial to be dried, as for example, coal, may be introduced through I `the. supply chute C4 in the feed cylinder C3,

y parts.

whence it will pass down through the feed chutes C1, C1 and fall into 'the lower part of the dish-shaped screen just behind the chutes in the direction of the motion of the Since the Scrapers move a little slower that the chutes and the screen, though all move in the same direction, they will have anapparent motion in a direction opposite to that of the general motion of the parts, and thus the Scrapers will tend to move the material along the screen surface toward the next chute. During this process the water will be'expelled Aby centrifugal force and the material will. tend to climb up the edge of the dish-shaped screen and pass outwardly over the annulus into the material box. ,Whatever does not so escape and whatever accumulation of material therek may be upon the surface of the screen which forA any reason does not move upwardly will be carried along by the Scrapers until it reaches the discharge chute whereupon, the

kangle of inclination being greater and the material being discharged in such chute in a dried condition and the'surface of the bottom of said chute being smooth, if desired the material will be expelled from such chute by centrifugal l force and pass upwardly and outwardly over Athe annulus. If the bottom of said chute does'consist of screened material, some of the water may, of course, be expelled at that point also. ln

Aany event, the water is accumulated in the to the screen.

menace water box, whence it escapes at the waste discharge and the coal in the coal box, whence it escapes at the bottom.

l have shown the dish-shaped screen as placed in horizontal position. It could be, however, placed in any other desired position, since during its effective operation the force of gravity may be disregarded.

claim:

1. A centrifugal drier comprising a screen, an outwardly and upwardly inclined discharge chute, a scraper adapted to travel over the surface of the screen and across the chute, means for rotating the screen and chute in unison and the scraper differentially, and means for supplying the material to the screen. f

2. A centrifugal drier comprising an inclined screen and discharge chute the screen and .chute portions being outwardly and upwardly inclined at different angles, a scraper adapted to travel over the surface of the screen and across the chute, means for rotating the screen and chute in unison and the scraper differentially and means for supplying the material to the screen.

3. A centrifugal drier comprising a dishshaped screen and discharge chute, the screen and chute portions being outwardly and upwardly inclined the latter ata greater angle to the vertical than the screen surface, scrapers adapted to travel over the surface of thel screen and across the chute, means for rotating the screen and chute in unison and the scraper 'differentially and means for supplying the material to the screen. A

el. A centrifugal drier comprising a dishshaped screen, a discharge chute outwardly and upwardly inclined with respect to the screen surface, a scraperadapted to travel over the surface of the screen and across the chute, means for rotating the screen and chute in unison and the scraper diferentially and means for supplying the material to the screen. l

5. A centrifugal drier comprising a dish? shaped screen, an outwardly and upwardly inclined discharge chute, a scraper adapted to travel over the surface of the screen and across the chute at substantially right angles 115 to the line of travel ofthe material across the screen, means for rotating the screen and chute in unison and the scraper differentiallyv and means for supplying the'material a i n a .6. A centrifugal drler comprislng a dishshaped screen and anvoutwardly and upwardly inclined radially disposed discharge chute, a scraper adapted to travel over thel surface of the screen and across the chute 125 substantially at right angles to the line of i travel of the material over the screen, means for rotating the screen and chuten unison and the 4 scraper differentially and means for supplying the material-to the screen. 110

n 7. A, centrifugal drier comprising ai screen,

-land means for supplying the material to the screen in front of the scraper and on the far side of the chute as the scraper travels around the screen.

8. A centrifugal drier comprising an inclined screen and a discharge chute out- Wardly and upwardly inclined at different angles, a scraper adapted to travel over the surface of the screen and across the chute, means for rotating the screen and chute in unison and the scraper dierentially to move the scraper along the screen and means for supplying the materia-l to the screen in front of the scraper and on the far side of the chute as the scraper travels around the screen. j

9. A centrifugal drier comprising a dishshaped screen and discharge chute, the latter outwardly and upwardly inclined at a greater' angle to the vertical than the screen surface, Scrapers adapted to travel over the surface of the screen and across the chute, means for rotating the screen and chute in unison and the scraper differentially to move the scraper along the screen and means for supplying the material to the screen in front of the scraper and on the far side of the chute as the scraper travels around the screen.

10. A centrifugal drier comprising a dish- Vshaped screen and discharge chute outwardly and upwardly inclined to the screen surface, a scraper adapted to travel over the surface of the screen and across the chute, means for rotating the screen and chute in unison and the scraper differentially to move the scraper' along the screen and means 'for supplying the material to the screen on the far side of the chute, and in front of the scraper as it travels around the screen.

11. A centrifugal drier comprising a dishshaped screen and outwardly and upwardly inclined discharge chute, a scraper adapted to travel over the surface of the screen and Copies of this patent may be obtained for across the chute at substantially right angles to the line of travel of the material across the screen, means for rotating the screen' and chute in unison and the scraper differentially-and means for supplying the material to the screen just beyond the chute in the direction of the travel of the scraper around the screen.

l2. A centrifugal drier comprising a dishshaped screen and outwardly-and upwardly inclined discharge chute located in a substantially radial plane, a scraper adapted to travel over the surface of the screen and across the chute substantially at right angles to the line of travel of the material over the screen, means for rotating the screen and chute in unison andthe scraper differentially and means for supplying the material to the screen just beyond the chute in the direction of the travel of the scraper around the screen. v 13. A centrifugal drier comprising a dislishaped screen with radial discharge chutes across its surface, a scraper adapted toV tra'vel around the dish-shaped Surface and to pass over the discharge chutes, means for rotating the screen and the scraper differentially, water and material boxes surrounding the screen and means for driving the screen and scraper differentially and means for supplying the material to the screen.

14. A centrifugal drier comprising a dishshaped screen with radial discharge chutes across its surface, a scraper adapted to travel around the dish-shaped surface and to pass over the discharge chutes, Water and material boxes surrounding the screen,

means for driving the screen and scraper differentially and means for supplying the material to the screen, said means adapted to discharge at one side of the chute in the direction ofthe travel of the scraper thereabout.

In testimony whereof, I affix my signature in the presence of two Witnesses :this 24th day of May, 1915.

CARL A'. WENDELL.

tive cents each, by addressing the commisaioner o! Patents. wllhintom, D. 0." 

